SMS 2.0 with the SUS Feature Pack provides the best patch management system for your environment. It combines the abilities of SUS with the rich feature-set of SMS 2.0. SMS 2003 will also use the same Feature Pack to keep your computers secure. Don't expect Microsoft to increase functionality for any platform other than Windows. Beyond reading Microsoft's documentation on the Feature Pack, you can generally get some great information from myITforum.com on patch management.
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